You administer a Windows HPC Server 2008 cluster that has 150 nodes. Users report that cluster jobs take longer than normal to complete. You need to calculate the network latency between the nodes. What should you do?

A.
Run a serial ring test across all nodes by using the mpipingpong.exe utility.

B.
Run the ping command on all broker nodes by using the clusrun.exe utility.

C.
Run the etl2otf command on all nodes by using the mpiexec.exe utility.

D.
Run the etl2clog command on all broker nodes by using the mpiexec.exe utility.